This comes with the ASK Toolbar, this can be unchecked during the main apps installation process.

This is a excellent duplicate file removal tool, and comes recommend by senior PCHF staff...

Auslogics Duplicate File Finder

Major Geeks Mirrors

A good safe tool in the right hands. but could be very detrimental to novices .

There Is One More Free Duplicate File Finder, is a FREE tool designed to find and delete duplicate files over home and corporate network while no software installed on other computer. Fast byte-to-byte and CRC32 comparison gives you the most accurate results and duplicate file finder searches duplicate file contents regardless of filename. A list of find duplicate files can be sorted, exported, and acted upon. A search session including results can be saved. Duplicate files can be remove, moved, or copied. Deleting duplicates will help to speed up indexing and reduces back up time and size. Your computer isn’t fully optimized until you’ve removed all unnecessary clone files. Let Clone Remover find and remove the duplicates! Regain valuable disk space and improve data quality.

There's also Duplicate Cleaner by Digital Volcano.